diff --git a/config/zsh/.zshenv b/config/zsh/.zshenv
index 704b17d..a7a6c10 100644
--- a/config/zsh/.zshenv
+++ b/config/zsh/.zshenv
@@ -1,3 +1,5 @@
+#shellcheck disable=SC2034
+
 skip_global_compinit=1
 export XDG_CACHE_HOME=/tmp/${USER}-cache
 export XDG_CONFIG_HOME=$HOME/.config
diff --git a/config/zsh/.zshrc b/config/zsh/.zshrc
index b19eacb..7f22a25 100644
--- a/config/zsh/.zshrc
+++ b/config/zsh/.zshrc
@@ -1,12 +1,14 @@
+# shellcheck disable=SC1091,SC1094,SC2206,SC2148
+
 # macOS specific
 if [[ $(uname -s) = "Darwin" ]]; then
   eval "$(/opt/homebrew/bin/brew shellenv)"
 fi
 
 # prepare directories
-touch $HOME/.hushlogin
-mkdir -p $XDG_CACHE_HOME/zsh
-mkdir -p $XDG_DATA_HOME/zsh
+touch "${HOME}/.hushlogin"
+mkdir -p "${XDG_CACHE_HOME}/zsh"
+mkdir -p "${XDG_DATA_HOME}/zsh"
 
 # global exports and options
 setopt HIST_IGNORE_ALL_DUPS
@@ -14,34 +16,35 @@ setopt HIST_SAVE_NO_DUPS
 setopt HIST_REDUCE_BLANKS
 setopt SHARE_HISTORY
 setopt INC_APPEND_HISTORY
-rm $ZDOTDIR/.zsh_history && ln -sf $XDG_DATA_HOME/zsh/history $ZDOTDIR/.zsh_history
+rm "${ZDOTDIR}/.zsh_history" && ln -sf "${XDG_DATA_HOME}/zsh/history" "${ZDOTDIR}/.zsh_history"
 
 # set path
 path=(~/.local/bin "${path[@]}")
 
 # source configuration
-source $ZDOTDIR/aliases.zsh
-source $ZDOTDIR/cleanhome.zsh
-source $ZDOTDIR/keys.zsh
+source "${ZDOTDIR}/aliases.zsh"
+source "${ZDOTDIR}/cleanhome.zsh"
+source "${ZDOTDIR}/keys.zsh"
 ## it has to be last
-source $ZDOTDIR/fzf.zsh
+source "${ZDOTDIR}/fzf.zsh"
 
 # source modules
-source $HOME/.local/git/zsh_modules/fast-syntax-highlighting/fast-syntax-highlighting.plugin.zsh
-source $HOME/.local/git/zsh_modules/wd/wd.plugin.zsh
-export WD_CONFIG=$XDG_CONFIG_HOME/wd_list
+source "${HOME}/.local/git/zsh_modules/fast-syntax-highlighting/fast-syntax-highlighting.plugin.zsh"
+source "${HOME}/.local/git/zsh_modules/wd/wd.plugin.zsh"
+export WD_CONFIG="${XDG_CONFIG_HOME}/wd_list"
 
 # set fpath
 fpath=(~/.local/git/zsh_modules/wd $fpath)
 
 # theme and colors
 if [[ $(command -v vivid) ]]; then
-  export LS_COLORS=$(vivid generate molokai)
+  LS_COLORS=$(vivid generate molokai)
+  export LS_COLORS
 else
   unset LS_COLORS
 fi
 if [ "$TERM_PROGRAM" != "Apple_Terminal" ]; then
-  eval "$(oh-my-posh --config ${XDG_CONFIG_HOME}/omp/omp.toml init zsh)"
+  eval "$(oh-my-posh --config "${XDG_CONFIG_HOME}/omp/omp.toml" init zsh)"
 fi
 
 # completion
@@ -49,23 +52,20 @@ zstyle ':completion:*' menu select
 zstyle ':completion:*' list-colors ''
 
 autoload -Uz compinit
-if [ ! -e $XDG_DATA_HOME/zsh/zcompdump.zwc ]; then
+if [ ! -e "${XDG_DATA_HOME}/zsh/zcompdump.zwc" ]; then
   autoload -Uz zrecompile
-  zrecompile -p -R $XDG_DATA_HOME/zsh/zcompdump
+  zrecompile -p -R "${XDG_DATA_HOME}/zsh/zcompdump"
 fi
-compinit -C -d $XDG_DATA_HOME/zsh/zcompdump
+compinit -C -d "${XDG_DATA_HOME}/zsh/zcompdump"
 
 # quick note functionality
-if [[ -f ~/.note ]]; then
+if [[ -f "${HOME}/.note" ]]; then
   echo
-  cat ~/.note
+  cat "${HOME}/.note"
   echo
 fi
 
-# cleaning
-rm -rf ~/.warprc
-
 # local settings
-if [[ -f $HOME/.local/config/zsh ]]; then
-  source $HOME/.local/config/zsh
+if [[ -f "${HOME}/.local/config/zsh" ]]; then
+  source "${HOME}/.local/config/zsh"
 fi
diff --git a/config/zsh/aliases.zsh b/config/zsh/aliases.zsh
index 6dd3b68..ea0e32a 100644
--- a/config/zsh/aliases.zsh
+++ b/config/zsh/aliases.zsh
@@ -61,7 +61,7 @@ fi
 
 function ud() {
   for i in ${LOCAL_GIT_DIR}/dotfiles ${LOCAL_GIT_DIR}/zsh_modules/*; do git -C ${i} pull; done
-  . ${LOCAL_GIT_DIR}/dotfiles/scripts/post-update.sh
+  . "${LOCAL_GIT_DIR}/dotfiles/scripts/post-update.sh"
 }
 
 function upgrade() {
diff --git a/config/zsh/cleanhome.zsh b/config/zsh/cleanhome.zsh
index bb81947..9ef8a1b 100644
--- a/config/zsh/cleanhome.zsh
+++ b/config/zsh/cleanhome.zsh
@@ -1,2 +1,2 @@
-export GNUPGHOME="$XDG_DATA_HOME/gnupg"
+export GNUPGHOME="${XDG_DATA_HOME}/gnupg"
 export LESSHISTFILE='/dev/null'
diff --git a/config/zsh/fzf.zsh b/config/zsh/fzf.zsh
index 4bc3461..6bfb748 100644
--- a/config/zsh/fzf.zsh
+++ b/config/zsh/fzf.zsh
@@ -9,12 +9,12 @@ if [[ $(command -v fzf) ]]; then
   --border=none --preview=sharp --layout=reverse
   --prompt="> " --marker=">" --separator="" --scrollbar="│"
   '
-  export FZF_DEFAULT_OPTS=$FZF_COLORS" --multi -e --ansi --preview='bat --color=always --tabs=2 --style=plain --theme=Monokai\ Extended\ Bright {}'"
-  export FZF_CTRL_R_OPTS=$FZF_COLORS" -e --ansi --preview=''"
+  export FZF_DEFAULT_OPTS=${FZF_COLORS}" --multi -e --ansi --preview='bat --color=always --tabs=2 --style=plain --theme=Monokai\ Extended\ Bright {}'"
+  export FZF_CTRL_R_OPTS=${FZF_COLORS}" -e --ansi --preview=''"
   _fzf_compgen_path() {
-    fd -H -L --ignore-file ~/.local/config/fd . "$1"
+    fd -H -L --ignore-file "${HOME}/.local/config/fd" . "$1"
   }
   _fzf_compgen_dir() {
-    fd -H -L --ignore-file ~/.local/config/fd --type d . "$1"
+    fd -H -L --ignore-file "${HOME}/.local/config/fd" --type d . "$1"
   }
 fi
diff --git a/scripts/post-install.sh b/scripts/post-install.sh
index a9c2bc0..415956c 100644
--- a/scripts/post-install.sh
+++ b/scripts/post-install.sh
@@ -1,9 +1,9 @@
 #!/bin/sh
 
 # basic git configuration
-if [[ ! -d ${XDG_CONFIG_HOME}/git ]]; then
-  mkdir -p ${XDG_CONFIG_HOME}/git
-  cat << EOF > ${XDG_CONFIG_HOME}/git/config
+if [ ! -d "${XDG_CONFIG_HOME}/git" ]; then
+  mkdir -p "${XDG_CONFIG_HOME}/git"
+  cat << EOF > "${XDG_CONFIG_HOME}/git/config"
   [pull]
     rebase = true
 EOF